WSF
Vishay Dale
Metal Film Resistors, Power, Surface Mount
FEATURES
•
Molded encapsulation
•
Wraparound Compliant Terminations eliminate
risk of solder fillet cracking
•
Solderable terminations
•
Excellent stability at different environmental
conditions
•
High power ratings (up to 2 W)
Pb-free
Available
e3
RoHS*
COMPLIANT
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
WSF2012
WSF2515
WSF4527
SIZE
INCH
2012
2515
4527
POWER RATING
P
70 °C
W
0.5
1.0
2.0
2)
TOLERANCE
±%
0.5, 1, 5
0.5, 1, 5
0.5, 1, 5
RESISTANCE
RANGE
Ω
5.0 - 1.43K
1)
10 - 10K
10 - 100K
ENCAPSULATION
Epoxy
Thermoplastic
Thermoplastic
Notes
1) E96 values only
2) Resistance values above 31 250
Ω
are limited to 250 maximum working voltage
• Part Marking: 1/2 W - DALE, Value; 1 W - Model, Value, Tolerance, Date Code; 2 W - DALE, Model, Value, Tolerance, Date Code.
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Dielectric Withstanding Voltage
Insulation Resistance
Operating Temperature Range
Maximum Working Voltage
Weight/1000 pieces (typical)
UNIT
ppm/°C
V
AC
Ω
°C
V
g
- 65/+ 175
(P x
R)
1/2
90
WSF2012
± 100
3)
WSF2515
± 100
> 10
9
- 65/+ 175
(P x
R)
1/2
165
3)
WSF4527
± 100
3)
> 500
- 65/+ 150
(P x
R)
1/2 4)
760
> 500
> 500
Notes
3) ± 50 ppm/°C and ± 25 ppm/°C available
4) Resistance values above 31 250
Ω
are limited to 250 V maximum working voltage
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: WSF25151K500JKTA (preferred part numbering format)
W
GLOBAL MODEL
WSF2012
WSF2515
WSF4527
S
F
2
5
1
5
1
K
5
0
0
J
K
T
A
SPECIAL
(Dash
Number)
(up to 2 digits)
From
1 - 99
as
applicable
VALUE
R
= decimal
K
= thousand
54R15
= 54.15
Ω
1K325
= 1.325 kΩ
TOLERANCE
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
H
= ± 3.0 %
J
= ± 5.0 %
K
= ± 10 %
TCR
E
= 25 ppm/°C
H
= 50 ppm/°C
K
= 100 ppm/°C
PACKAGING
EA
= Lead (Pb)-free, tape/reel
EK
= Lead (Pb)-free,
bulk
TA
= Tin/Lead, tape/reel (R86)
BA
= Tin/Lead,
bulk
(B43)
Historical Part Number example: WSF2515 1.5 kΩ 5
%
100 ppm/°C R86 (will continue to be accepted)
WSF2515
HISTORICAL MODEL
1.5 k
Ω
RESISTANCE
VALUE
5
%
TOLERANCE
CODE
100 ppm/°C
TEMPERATURE
COEFFICIENT
R86
PACKAGING
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 30104
Revision: 02-Aug-07
For technical questions, contact: ww2aresistors@vishay.com
www.vishay.com
233
WSF
Vishay Dale
DIMENSIONS
MODEL
W
H
Metal Film Resistors, Power, Surface Mount
DIMENSIONS
in inches [millimeters]
L
0.200 ± 0.020
[5.08 ± 0.508]
0.250 ± 0.020
[6.35 ± 0.508]
H
T
W
W
1
0.096 ± 0.015 0.040 ± 0.010 0.125 ± 0.005 0.050 ± 0.005
[2.44 ± 0.381] [1.02 ± 0.254] [3.18 ± 0.127] [1.27 ± 0.127]
0.110 ± 0.015 0.045 ± 0.010 0.150 ± 0.005 0.098 ± 0.005
[2.79 ± 0.381] [1.14 ± 0.254] [3.81 ± 0.127] [2.49 ± 0.127]
WSF2012
WSF2515
W
1
WSF4527
0.455 ± 0.020 0.167 ± 0.010 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.005
[11.56 ± 0.508] [4.24 ± 0.254] [2.54 ± 0.254] [6.98 ± 0.127] [5.46 ± 0.127]
T
L
l
b
MODEL
WSF2012
SOLDER PAD DIMENSIONS
in inches [millimeters]
a
0.085 [2.16]
0.090 [2.29]
0.155 [3.94]
b
0.070 [1.78]
0.115 [2.92]
0.230 [5.94]
l
0.080 [2.03]
0.120 [3.05]
0.205 [5.21]
a
WSF2515
WSF4527
Temperature Rise in °C
Rated Power In
%
200
120
100
80
60
40
WSF2012
WSF2515
150
WSF2515
100
WSF2012
WSF4527
50
20
WSF4527
0
0
0.5
1.0
1.5
2.0
Power in W
0
- 65
- 25
0
25
50
Temperature Rise
PERFORMANCE
TEST
Thermal Shock
Short Time Overload
Low Temperature Storage
High Temperature Exposure
Bias Humidity
Moisture Resistance
Mechanical Shock
Vibration
Load Life
Resistance to Solder heat
Derating
75 100 125 150 175 200
Ambient Temperature in
°C
70
CONDITIONS OF TEST
- 55 °C to + 150 °C, 1000 cycles, 15 minutes at each extreme
5 x rated power for 5 seconds
- 65 °C for 24 hours
1000 hours at + 175 °C (150 °C for WSF4527)
+
85
°C,
85 %
RH, 10
%
Bias, 1000 hours
MIL-STD-202 Method 106, 0
%
Power, 7a and 7b not required
100 g’s for 11 milliseconds, 5 pulses
Frequency varied 10 to 500 Hz in one minute, 3 directions, 9 hours
1000 hours at rated power, + 70 °C, 1.5 hours “ON”, 0.5 hours “OFF”
+ 260 °C solder, 10 - 12 second dwell, 25 mm/second emergence
TEST LIMITS
± (1.0
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (1.0
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
± (1.0
%
+ 0.05
Ω)
Δ
R
± (0.5
%
+ 0.05
Ω)
Δ
R
PACKAGING
MODEL
WSF2012
WSF2515
WSF4527
REEL
TAPE WIDTH
12 mm/Embossed Plastic
16 mm/Embossed Plastic
24 mm/Embossed Plastic
DIAMETER
330 mm/13"
330 mm/13"
330 mm/13"
PIECES/REEL
2000
2000
1200
CODE
EA/TA
EA/TA
EA/TA
Embossed Carrier Tape per EIA 481-1, 2.
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234
For technical questions, contact: ww2aresistors@vishay.com
Document Number: 30104
Revision: 02-Aug-07
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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